Use the subcommands assign and unassign assign specific CPUs, cores, and sockets.
The assignand unassign subcommands are applicable to both the persistent and runtime configurations of the pools. Using assign and setting pset.min and pset.max directly are mutually exclusive. Each method overwrites the configuration set by the other. CPUs configured to psets by using the pset.min and pset.max properties are considered allocated rather than assigned. The assign and unassign subcommands add and remove specific CPUs to or from a pset. The first assign operation will clear any pset configuration set up by a previous allocation. Use unassign only after a successful assign operation. The unassign subcommand cannot be used to manipulate CPUs from allocated psets.
Also see dedicated-cpu Zone Resource in Oracle Solaris Zones Configuration Resources.